A Lit candle is a Firemaking item used to light up dark areas. It is created by lighting a candle with a tinderbox. Lit candles will not stay lit forever and will eventually go out; it is advisable to always carry a tinderbox when using a candle for a light source. With the introduction of the tool belt, this is not necessary once the tinderbox has been added. There is also a black candle used during Merlin's Crystal, obtained from the Candle-maker in Catherby.

Players who enter the Lumbridge Swamp Caves with candles should be careful, as they tend to ignite swamp gas in certain areas. The explosion will extinguish the candle, cause about 150 life points worth of damage, and leave players at the mercy of whatever lurks in the dark until the candle is relit. One can put a candle in an empty candle lantern to prevent this from happening.